Quote:
Originally posted by MattyX:
Sure, the boat doesn't need lift, but you said the propellor pushes it, and you're right. The plane doesn't need lift to move forward, just to fly. It can move forward, though, and increase its airspeed enough to attain lift, no matter what the conveyor does.

::edited for grammar::
Put that same boat in a river. Trying to go UPstream. If the stream is matching the speed of the propeller...no movement.
_________________________
"Nature has constituted utility to man the standard and test of virtue. Men living in different countries, under different circumstances, different habits and regimens, may have different utilities; the same act, therefore, may be useful and consequently virtuous in one country which is injurious and vicious in another differently circumstanced" - Thomas Jefferson, moral relativist